.help qplotc May2007 rvsao
qplotc -- Use EMSAO or XCSAO to plot emission and absorption lines already
found in a spectrum file or list of spectra
.ls spectra = ""
List of file names of spectra to analyze. @filename indicates list should
come from file filename. As of version 1.3, apertures of multispec
spectrum files can be entered as numbers, lists, or ranges enclosed in
brackets after each file name in the list or file. This parameter is
directly passed to the task chosen below.
.ls qtask = "xcsao"
Task to run (xcsao or emsao)"}
.ls velplot = "combination"
Velocity to plot (combination or emission or correlation
.ls dispmode = 4
Format in which to display summary page on an interactive display device
and on the hard-copy device plotter. If the format code is negated, the
spectrum is plotted with the intensity scaled from zero rather than the
spectrum minimum. 2 or 4 are best for qplotting, although 3 and 5 will
give better resolution of the spectrum. cursor zoom works in all 4 of
=-1 Display all of spectrum, with portion used marked, scaled from an
intensity of zero, and cross-correlation with template information.
=0 Display only part of spectrum used in correlation and cross-correlation
with template information. (2.0)
=1 Display all of spectrum, with portion used marked, and cross-correlation
with template information.
=2 Display spectrum with absorption and known emission lines labelled
and both template and emission line information.
=3 Display spectrum with absorption and known emission lines labelled
using the entire display without the table of results
=4 Display continuum-subtracted spectrum with absorption and known emission
lines labelled and tables of template and emission line information.
=5 Display continuum-subtracted spectrum with absorption and known emission
lines labelled using the entire display without the table of results.
QPLOT runs either XCSAO without correlating or EMSAO with finding new
lines, then displays the spectrum with lines labelled and
previously-obtained results. These results should have been written
to the image headers using save_vel=yes when XCSAO and EMSAO were run.
The results are plotted by default in display mode 4 which displays the
spectrum with the continuum fit subtracted and lines in the bad line list
removed, if xcsao.fixbad=yes or emsao.fixbad=yes, as appropriate.
The cursor mode is turned on, so that initial conditions can be changed
(such as a new redshift guess or deleted cosmic ray) and the program
(XCSAO or EMSAO) can be rerun. The main reason for using QPLOT is to
set a quality flag in the spectrum image header. If the task is not
rerun, only the summary information is rewritten. If the spectrum is
recorrelated or refit, the new results are only written to the spectrum
header if a quality flag (y=OK, n=bad, j=questionable) is set.
To check the redshift of a single galaxy
cl> qplotc galaxy
To check redshifts for a whole night's worth of galaxy spectra:
cl> qplotc @nite1.ls